Paul Croft, a working-class bloke from Nottingham, had a giant tattoo of Hogwarts headmaster Albus Dumbledore etched on his back—a gesture meant to surprise and delight his five Potter-obsessed children. We think it's safe to say that of the many dangers Croft tried to anticipate in subjecting himself to the painful and permanent procedure, the after-the-fact outing of the character by the author at a public lecture in New York City was not one of them: